Abstract
In this work, we reveal the role of non-covalent interactions, which are known to play important roles in supramolecular phenomena, in achieving efficient perovskite surface and grain boundary passivation. By using a series of pseudohalides, we find that trifluoroacetate (TFA−) provides the strongest binding to iodide vacancies by means of non-covalent hydrogen bonding and dispersion interactions. By exploiting additional non-covalent dispersion and hydrophobic interactions in aromatic 3,3-diphenylpropylammonium (DPA+), we present a dual-ion passivation strategy that not only minimizes the non-radiative recombination center and local chemical inhomogeneities but also induces preferentially oriented growth of α-FAPbI3 lattice. This leads to an outstanding power conversion efficiency (PCE) of 25.63% with an exceptional open-circuit voltage of 1.191 V in a perovskite solar cell with a small area, while perovskite solar mini modules with aperture areas of 25 and 64 cm2 achieved PCE of 22.47% (quasi-steady-state [QSS]-certified 20.50%) and 20.88%, respectively, with outstanding stability under high-humidity conditions.
Original language | English |
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Pages (from-to) | 2283-2303 |
Number of pages | 21 |
Journal | Joule |
Volume | 8 |
Issue number | 8 |
DOIs | |
State | Published - Aug 21 2024 |
Funding
This research was supported by the Nano\u00B7Material Technology Development Program through the National Research Foundation of Korea (NRF), funded by the Ministry of Science and ICT (NRF-2021M3H4A1A02049634 and NRF-2022R1A2C1002764). This research was supported by the BrainLink program funded by the Ministry of Science of ICT through the National Research Foundation of Korea (NRF-2022H1D3A3A01077343). This research was supported by the Basic Science Research Program through the National Research Foundation of Korea (NRF), funded by the Ministry of Education (RS-2023-00276169). This work was supported by the Basic Science Research Program of the National Research Foundation of Korea (NRF-2021R1A2B5B01002879). Y.J. acknowledges support from the Technology Development Program to Solve Climate Changes of the National Research Foundation (NRF), funded by the Ministry of Science, ICT & Future Planning (2020M1A2A2080746) and the Development Program of the Korea Institute of Energy Research (KIER) (C4-2414 and C4-2460). J.Yang and M.A. acknowledge support from the National Science Foundation (NSF), award no. 2043205, and the Alfred P. Sloan Foundation (award no. FG-2022-18275). The CL microscopy was supported by the Center for Nanophase Materials Sciences (CNMS) user facility, project CNMS2022-A-01171, which is a US Department of Energy, Office of Science User Facility at Oak Ridge National Laboratory. Solid-state NMR measurements were conducted at the KBSI Western Seoul Center 9.4 T magnet. We thank Dr Young Joo Lee and Dokyung Kim for helping with NMR measurements. H.S. and H.C. initially conceptualized the work. H.-B.K. H.S. and J.Y.W. prepared the samples and conducted device fabrications and general characterizations. H.-B.K. and D.S.K. fabricated PSC mini modules. M.L. synthesized the DPA-X\u2217 salt. S.C.C. and S.U.L. contributed to computational calculations. W.H.J. and B.R.L. conducted steady-state PL and TRPL measurements. J.L. analyzed NMR spectroscopic data. J. Yeop and J.Y.K. carried out GIWAXS measurements. J. Yang, B.J.L. and M.A. conducted hyperspectral CL microscopy. M.K. and S.J.C. collected the light-intensity-dependent J-V data. H.S. wrote the draft with help from H.-B.K. J. Yang, W.H.J. and H.I.J. H.S. J. Yang, J.L. and H.C. revised and prepared the manuscript. M.L. S.U.L. Y.J. and H.C. supervised the project. All authors contributed to discussions and the preparation of the manuscript. The authors declare no competing interests. This research was supported by the Nano\u00B7Material Technology Development Program through the National Research Foundation of Korea (NRF), funded by the Ministry of Science and ICT ( NRF-2021M3H4A1A02049634 ). This research was supported by the BrainLink program funded by the Ministry of Science of ICT through the National Research Foundation of Korea ( NRF-2022H1D3A3A01077343 ). This research was supported by the Basic Science Research Program through the National Research Foundation of Korea (NRF), funded by the Ministry of Education ( RS-2023-00276169 ). This work was supported by the Basic Science Research Program of the National Research Foundation of Korea ( NRF-2021R1A2B5B01002879 ). Y.J. acknowledges support from the Technology Development Program to Solve Climate Changes of the National Research Foundation (NRF), funded by the Ministry of Science, ICT & Future Planning ( 2020M1A2A2080746 ) and the Development Program of the Korea Institute of Energy Research (KIER) ( C3-2403 and C3-2477 ). J.Y. and M.A. acknowledge support from the National Science Foundation (NSF) , award no. 2043205 , and the Alfred P. Sloan Foundation (award no. FG-2022-18275 ). The CL microscopy was supported by the Center for Nanophase Materials Sciences (CNMS) user facility, project CNMS2022-A-01171 , which is a US Department of Energy, Office of Science User Facility at Oak Ridge National Laboratory. Solid-state NMR measurements were conducted at the KBSI Western Seoul Center 9.4 T magnet. We thank Dr Young Joo Lee and Dokyung Kim for helping with NMR measurements.
Keywords
- FAPbI3 perovskite
- defect passivation
- large-area
- local homogeneity
- non-covalent interaction
- perovskite solar cells
- perovskite solar modules
- pseudohalides
- supramolecular interaction
- trifluoroacetate